摘要:
By using the fluoran compound represented by the following general formula (I); ##STR1## wherein R.sup.1 is alkyl containing 1 to 4 carbon atoms, R.sup.3 is alkyl containing 1 to 8 carbon atoms, R.sup.4 is hydrogen or alkyl containing 1 to 8 carbon atoms, or R.sup.3 and R.sup.4 may bond with each other to form a ring together with a N atom, R.sup.2 is alkyl containing 1 to 4 carbon atoms, and n denotes 0, 1 or 2, however, the substituents represented by R.sup.2 may be different with each other when n is 2, as a color former for color forming recording materials, recording materials which have excellent properties in whiteness of the background of the material under light and in photostability of color-formed images on the materials as well as in sufficient color forming capability of the material even after having exposed them to light, can be provided.
摘要:
An improved scroll type compressor is disclosed. A moveable scroll is eccentrically connected to a rotary shaft and opposed to a fixed scroll for forming a compression chamber. The moveable scroll performs an orbital movement about an axis of the rotary shaft without rotating about its own axis. With the orbital movement, the moveable scroll reduces the volume of the compression chamber and compresses coolant gas therein. A fixed wall is disposed adjacent to the moveable scroll on the opposite side from the fixed scroll. The fixed wall receives a reaction force of the compressed gas applied to the moveable scroll. First elements disposed between the fixed wall and the moveable scroll transmit the reaction force from the moveable scroll to the fixed wall. Second elements are disposed independently from the first elements between the fixed wall and the moveable scroll for determining the orbit of the moveable scroll.
摘要:
A received power preset value is varied in such a manner that SIR measured at the base station comes to coincide with the target value SIRt. By varying the received power preset value, a cell zone of the base station varies so that the number of mobile stations connected with the base station increases or decreases thereby SIR at each base station approximating with each other. As a result, deviation of communication quality is restricted so that efficiency of the system can be improved.
摘要:
A casing of a fixed disc memory unit consisting of a case body and a covering member jointly forming the casing with an air-tight sealing of a rubbery gasket therebetween can be imparted with very reliable moisture-proofness of sealing by forming the rubbery gasket by the FIPG method using a curable rubber composition comprising: (a) a fluorocarbon-containing organosiloxane polymer containing vinyl groups and consisting of the recurring units each represented by the general formula--[--SiMe.sub.2 --CH.sub.2 CH.sub.2 --Rf--CH.sub.2 CH.sub.2 --SiMe.sub.2 --O--]--,in which Rf is a fluorinated divalent polyether group; (b) an organohydrogenpolysiloxane or a fluorocarbon-containing organohydrogensiloxane having, in a molecule, at least two hydrogen atoms directly bonded to the silicon atoms; and (c) a catalytic compound in an amount sufficient to effect the addition reaction between the components (a) and (b).
摘要:
The present fluorosilicone rubber composition comprises a trifluoropropyl group-containing organopolysiloxane, a perfluoroalkyl group-containing organopolysiloxane, and a silica filler. This composition exhibits excellent resistance to any of nonpolar solvents, polar solvents, and fuel oils.
摘要:
The present room temperature curing composition comprises an organopolysilethylenesiloxane represented by the following general formula: ##STR1## wherein R.sup.1 to R.sup.4 each represent an alkyl having up to 8 carbon atoms or a phenyl group and n is an integer of 10 or above, and an organosilane or an organosiloxane having two or more hydrolyzable groups such as alkoxy groups in the molecule. The composition can form a cured product high in rubber strength and excellent in chemical resistance.
摘要:
A magnetic tape cassette has in the front portion of the housing two pairs of fixed tape guide ribs protruding the same length frontwardly of the housing to define a guide path for the magnetic tape and also protruding so as to form linear front edges of a height greater than the width of the tape, the fixed tape guide ribs in at least one pair being formed adjacent to each other, with the upper and lower ends of the protruding front edges being integrally joined by bridges of the same material. The bridges are formed to have a given, constant width and a given, constant height upwardly and downwardly.
摘要:
In an automatic loudness compensator provided in a sound reproduction device in a vehicle, the sound level is compensated to reproduce a sound source with the high fidelity intended by the producer of the source of sound. The level of sound frequency-pressure is increased or decreased relative to a middle range of sound frequency at a sound level lower or higher than a reference sound level, respectively. The level of sound frequency-pressure is also adjusted based on the noise produced by the movement of the vehicle and on the acoustic characteristic of the passenger compartment of the vehicle.
摘要:
The present invention relates to an automatic tool assembly apparatus for a modular constituted tool. The automatic tool assembly apparatus has a tool stock unit for storing a plurality of types of modular constituted tools for a machine tool disassembled in units of modules, a tool transfer unit for assembling a predetermined modular constituted tool from a plurality of modules in the tool stock unit and conveying the assembled modular constituted tool from the tool stock unit, and a control unit. The tool stock unit holds the modular constituted tool disassembled in units of modules. The stock position of each module required for assembling a tool requested by the machine tool is indexed from a signal from the control unit. The modules are then sequentially positioned at the assembly position. The tool transfer unit has an assembly head which is movable in a direction to approach and separate from the assembly position in response to an instruction from the control unit. The assembly head sequentially assembles the modules in response to signals from the control unit, thus obtaining the required modular constituted tool.
摘要:
The room-temperature curable silicone rubber composition is formulated, in addition to the conventional ingredients of a hydroxy-terminated diorganopolysiloxane and an organosilicon compound having at least two hydrolyzable groups in a molecule, a substantial amount of an alkali metal salt of a weak acid having an acid dissociation constant as expressed by pK.sub.a in the range from 2.0 to 12.0 at 25.degree. C. such as acrylic, methacrylic, benzoic and acetic acids. By virtue of this unique ingredient compounded therein, the composition of the invention can give a vulcanized rubber having outstandingly high resistance against oils used in automobiles even at elevated temperatures.